Contribution to a book:

Helmuth Cremer, André Grimaud and Jean-Jacques Laffont, "The Cost of Universal Service in the Postal Sector", in Current Directions in Postal Reform, Michael A. Crew and Paul R. Kleindorfer (eds.), series Topics in Regulatory Economics and Policy, vol. 35, chapter 3, Kluwer Academic Publishers, 2000, p. 47-68.

See also